Carbureter.



C. F. SOHULZ.

GARBURETER.

APPLICATION FILED 1111.19, 1911.

, 1,010,184. Patented Nov. 28, 1911.

To (ZZZ whom it mag concern:

UNITED sr TEs TE ormon.

CARL F. soHULz, or BROOKLYN, NEW 120m CARBURETER.

Be it known that I, CARL F.- SoHULz, citizenofthe United States, residing at Brook-- lyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Carbureters', ofv

which the following is a specification.

matically acting type of carbureter.

This invention comprehends certain new, I and useful improvements lIl carbureters for internal combustionengines, and the invention has for its primary object an improved construction of device of'this character embodying and possessing the characteristics of bureters of the mechanical type, as well as the characteristics of simplicity and sensitiveness and other advantages of the auto- The -inven.tion also has :for its" object, an Improved carbureter embodying a pneumatically actuated air admission Valve so 'arranged that when it is-desired to have the yalve movedtoward open position under the mfluence'of the suction of.the engine, it is only necessary to. admit atmospheric pressure on that side of the valve or piston which is not exposed to the vacuum created by the suction'of the engine, andalso so arranged that when it is desired to arrest or limit thev movement ofthe valve or piston in any desired place, it is only necessary to cut off the atmospheric pressure or-communication from the face of the' valve or piston not exposed to the vacuum in the, mixing chamber, the pressure being automatically balanced on both sides of the valve or piston by establishing communication between the mixing chamber and the face, of the piston which is not exposed to said chamber.

" The invention also has for its object an improved carbureter which may be practically termed a throttleless'carbureter'or one embodying only a pneumatic throttle, the air valve, throttle, and fuel valve 'all moving together, and means being provided,

as above stated, whereby the movement of the air-admission valve may be arrested or limited in any desired position by the balancvalve.

ing of pressure on opposite sides of the piston which forms part of said admission A still further object of the invention is a carbureterembodying an automatic valve Specification of Letters Patent.

all .times the proper proportion of fuel and air under a varylng vacuum. And the in- :vention also aims to simplify and. render more durable and efficient, devices of this :character so as to make them more useful and commercially desirable.

With these and' other objects'in view that will. more fully appear as the description proceeds, the invention consists ,in certain constructions, arrangements and combinations of the parts that I shall hereinafter fully describe and claim.

.For a full understanding of the invention, reference is to be had to the following description' and i which: J

a Patented Nov.-28, 1911. Application filed January 19, 1911. Serial No. 603,491,

7O accompanying drawing in Figure -1 is a vertical sectional View of a carbureter embodying the improvements of my invention, parts being shown in side elevat'ion and one part being partly broken out.

Fig. 2 is a horizontal sectional View on the line 2-2 of Fig.1; Fig. 3 is a detail sectional view of a pressure regulating valve hereinafter specifically referred to; Fig. 4

is a view illustrating a different form of said 4 valve; and, Fig. 5 illustrates in detail a por-- tion of the inspirator nozzle and its valve.

The casing of my improved automatic carbureter is provided with afloat chamber 1 having a fuel inlet passage 2 leadingthere- .to, an opening 1 to-the atmosphere, and an air inlet opening 3 designed to communlcate with the interior of a downwardly projecting cylinder 4' forming part of thecasing,

and a mixing chamber!) which commun1'-' cates with the interior of an upwardly projecting cylinder 6 forming the upper] end of the casing,

' The top 7 of the casing is .formedjwith a longitudinally disp sed and preferably centrally' located tublfiar bearing 8 in which a cylindrical sleeve 9 is mounted for longitudinal movement, the sleeve being formed at its upper end with a grooved collar 10- in which the forked arm of a bell-crank controlling lever 11 is mounted,.the other arm of; said lever being connected fin anydesired way to some operative'means (not shown) in convenient proximity to the operator. I

A longitudinally fluted or'ribbed stem 12 is mounted for longitudinal movement in the the sleeve 9' through the passages produced 'by thefluted formation of the stem 12.

A piston is mounted to move longitudi nally in the cylindrical. portion 6 of the casing, said piston, specifically considered in the present embodiment of the invention,

being formed with a depressed head 16 whereby a chamber is alwaysmaintained within the cylinder 6 on that face of the piston which is not exposed to the partial vacuum created in the mixing chamber 5 by the suction of the engine. 'ihe pressurecontrolling stem 12 passes down entirely through the sleeve 9 and its surrounding bearing 8 and freely down-through a central opening fdrmed for it in the head 16 of the piston 15, .being provided witha valve seat 17 designed to open and close any desired number of ports 18 that are formed in the head 16, said ports being designed to establish communication between the mixing chamber 5 and that face of the'piston 1o whichis not exposed to the suction created in said mixing chamber, Normally, the

valve seat 17 'is held against the ports 18 by an expansion spring 19, as clearly illustrated in the drawing. The stem 12 is connected to or identical with the stem 20 of the'fuel-controlling valve the-lower end. of which works within the spray nozzle 21 which is. located in the downwardly projecting cylindrical end 4 of the casing.

"A port 22 leads from embodied in the casing, saidport being controlled by a port 24 which leads into a chamber 25 formed in the downwardly extending cylindrical lower end 26 of the piston '15, the lowerend of this chamber communi- 'cating directly with the interior of a tube 27 which depends from the-main body portion of the piston 15" and the interior of which constitutes a I fuel inspirating and mixing passage 28 leading directly into the interior of the mainbody portion of the piston and from thence communicating .directlywith thevmixing chamber 5. The

. produce piston ,15 with its extensions constitutes" in; efiect a pneumatic throttle and air-admission valve combined and moves. with and which operates-in the spray nozzle 21. The

' parts are :normally held in closed position by aspring29 or its equivalent, although it is to be understoodthat this is not indis.-

pensable, as .other means may be provided for this purpose.

From as much preceded, drawing,

of the description as it will be unders'tood that in the the movement-of the fuelyalve" together with the accompanying practical operation of my improved carbureter, when theengine is started, the bell crank lever 11 isoperated so as to move the 'sleete 9 downwardly, separating the face or 'seat 14 of the sleeve the desired distance from the shoulder or seat 13 of the pressurecontrolling stem 12, and thereby permitting I atmospheric air and pressure down through the sleeve to act on the upper side of the piston 15. Upon the admission of atmose pheric air to the upper side of the piston,

the piston will naturally move downwardly, owing-to-the fact that a partial vacuum is created in the mixing chamber by the suction of the engine, andconsequently, as the piston inovesdown, the port or ports 2& I

will register with the port 22, so as to admit air into the 'air passage or chamber 25 and from thence into the mixing passage 28 in which 'thestem of the fuel-controlling valve is mounted. It is manifest that the stem 12 will movedown as the piston 15 moves. down, and consequently, when the valve stem 12 has moved in the sleeve-9 sufiiciently to effect the engagenient'of'the seats 13 and 14, the atmospheric communication between the space within'the cylinder 6 on the upper face-or side of the piston 15, will be cut ofi, while the communication between the Y -.mixing chamber 5 and said space or chamber on the upper side of theipiston will be established through the ports 18 that'are normally closed by the valve seat 17 of the stem 12. Hencethepressure on-both sides of the piston will be balanced, the atmospheric communication from the side of the piston not exposed to the vacuum in the mixing the air inlet open ingf3'in'to the air'inlet' chamber 23 that is chamber will be shut off, and the opening 4 movement of the piston will be arrested.

It will thus be seen that, broadly considered, Ihate provided a very simple carbureter in which, when it is desired to have 'the air admission valve move towardopen position under the influence of the suction Y of the engine, it is only necessary. to admit atmospheric pressure on that side 'of the piston which is. not exposed to the vacuum created by the suction of the engine; and that'when it is desired to arrest or limit the movement of the valve or piston in any desired place, it; is only necessary to cut otf'the atmospheric communication from that side of the valve o'rp'istonwhich is not exposed to the partial vacuum in the mixing cham-- ber, and'tobalance the pressure on both sides. of the piston as hereinbefore specified.

In addition to the features described in the "foregoing part of the specification, my

invention also embodies a valve 30 which is mounted in a pipe orv other connection 31..

between-the mixing chamber 5 and the space fuel in the float chamber 1. In a carburetor such as that -here shown, itis evident that the 'vacuumwill vary greatly in the mixing above the gasolene or other hydro-carbon chamber, ,as well as the velocity of the incoming air and fuel. It is well known that with an air and fuel mechanism maintained at an approximate constant ratio or opening between the two, an increase of velocity or sure on the liquid fuel in the float chamber will drop with an increase of vacuum in the mixing chamber, as the valve will rise. If it be desired to have the pressure on the fuel increase rather than decrease, it is only necessary to have the V-slotbroadened out atthe top, gradually decreasing, instead of,

increasing, communication between the mixing chamber and the float chamber as the vacuum increases in the former. This form of the regulating Valve is illustrated in Fig.

4, where 30 designates the valve and '32? theslot thereof. It is of course to be understood that the increase of pressure on the fuel, if this be desired, isonly relative. It can never become greater than atmospheric pressure.

By my invention, I eliminate every obstruction to the progress of the air and fuel, upon admission, to the engine, thereby insuring greater power, better carburation, and less condensation and loss of fuel in the Inixing chamber.

lVhile the accompanying drawing shows what I believe to be the preferred embodiment of my invention, it is to be understood that my invention is notlimited thereto, as various changes may be made in the construction, arrangement and proportions of the parts without departing from the scope of the invention as defined in the appended claims.

What I claim is:

1. A carbureter embodying a fuel inlet "alve and provided with an air inletopening and a mixture outlet opening, an air admission valve arrangedto admit air from the air inlet opening 'into the carburetor whereby it may pass to the mixture outlet opening, said valve being movable by suction toward openposition, and pressure-controlling means arranged to balance the pre. sure of'the suction on opposite sides of said valve, at predetermined positions thereof.

2. A carbureter embodying a fuel inlet valve and provided with an air inlet opening and a mixture 'outlet opening, an airadmission valve connected to the fuel valve and arranged to admit air into the carbureter from the air inlet opening whence it may pass to the mixture outlet opening, and

pressure-controlling means arranged to balance the pressure of the suction on opposite sides of said valve at predetermined points in, the movement of the air-admission valve toward open position.

3. A carbureter, embodying a fuel inlet valve, and provided with an air inlet opening and 'a mixture outlet opening, an air admission valve arranged to admit air into the carbureter from the air inlet opening whence it may pass to the mixture outlet opening, one face of said air-admission valve being exposed to the suction 1n the mixture outlet opening, means for admitting atmospheric air to the opposite face of said valve whereby to permit the suction to move said valve toward the open position, and means, controllable atwill, for automatically shutting ofi' atmospheric pressure from such side of the air-admission valve, and for balancing the pressure of the suction 011 both sides of such valve.

4. A carbureter embodying a fuel inlet 'valve and provided with an air inlet opening and a mixture outlet opening, anair-admission valve operatively connected to the fuel inlet valve and having one of its sides exposed to the mixture outlet opening whereby to be acted on by the suction therein, means for admit-ting atmospheric air to' the opposite side of said air-admission valve, and means for shutting off said atmospheric air and for opening communication between such side of the air-admission valve and the side which is exposed to the mixture outlet openin 5. A carbureter embodying a fuel inlet valveand provided with an air inlet opening and a mixture outlet opening, an air-admission valve embodying a piston provided with a passage surrounding the fuel inlet valve and a port leading to said passage and adapted to register with the air inlet opening, the passage leading to the mixture outlet opening, said piston having-one side exposed to the suction in the mixture outlet ()])(l'1i1lg', means. controllable at will for admitting atmosplu-u'ic air to the opposite side of said piston, and means for automatically shutting oli' said atmospheric air and for establishing communication between the opposite sides of the piston.

6. In a carbureter, the combination of a fuel inlet valve, a casing in which said valve is mounted, the casing being provided with an air inlet opening and a mixture outlet opening, an air-admission valve adapted to admit air into the casing from the a1r mlet opening whence it may pass to the mixture outlet opening said air-admission valve having one side exposed to the suction in the mixture outlet opening, adjustable means arranged to admit atmospheric air to the opposlte side of said "air-admission valve -whereby to permit saidlvalve to move by suctlon toward open position to a prede;

termined point, and means for automatically.

{shutting off the atmospheric air from such side of'the air-admission valve and for openmg such side to the suction 1n themixture outlet opening when such point has beenreached; v

\7. A carbureter, comprising a casing provided withan air inlet opening and a .'mixture outlet opening, a piston movable in 'said casing and provided with a head one side of which is exposed to the suction in the mixture outlet opening,-the piston being provlded w th a port-adapted to register with theair inlet opening to permit air toenter the casing and'thence flow to the mixture outlet opening, asleeve movable in said casing and adapted to beheld indifferent adjusted positions therein, a pressure-con -.troll1ng stem movable in said sleeve and adapted tocontrol the admission of atmos phe'ric air. into the sleeve whence it may pass to that side of the piston head which is notexposed to'the' suction in the mixture outlet opening, the head being provided I wlth ports and the stem being provided with a valve seat adapted to close said ports and spring-pressed toward closed position, .anda fuel-controlling valve connected to said stem.

8. A carbureter, comprising a casing provlded with an air mlet opening and a mixtune outlet opening, a fuel-controlling valve mounted in said casing, a piston movable in "said, casing and provided with a head one side of whichis exposed to the suction 1n the mixture outlet opening, asleeve movable 40" .adaptedto *control' the passage of 'atmospher'ic air through the sleeve and to that side of the, piston head which is not exposed. to the suctionin the mixture outlet open-- '45 'ing,-the headbeing formed with an openlng in one'end of the casing, a stem movable longitud nally in said sleeve, the stem being extending-therethrough and the stem' being provlded-with a valveseat'adapted to close said opening-the stem .being arranged to move the fuel-controlling valve and the pisto b ing P ovid dwi h a p r p ing providedin its ture register with the air inlet opening and with a? passage surrounding the fuel-controlling valve-and establishing communication between said port and the mixture outlet opening, and means for adjusting said sleeve to different positions.

9. A carbureter, comprising a casing formed with an air inlet opening and a mixture outlet opening, a fuel-controlling.

valve mounted in said casing, the casing betop with a longitudinally a sleeve mounted for a disposed bearing,

the

longitudinal movement in said bearing,

sleeve being provided with a collar, a controlling lever engaging said collar to move the sleeve longitudinally, a longitudinally fluted stem mounted in the sleeve and mov-. able longitudinally therein, the stem being operatively connected to the fuel-controlling valve and; provided at its upper end with a head adapted to abutvagainst one end of the sleeve to shut off the access of atmosjpheric air to the interior of thesleeve and thence to that side of the piston which :is not exposed to the suction in the mixture outlet opening, the opposite side of the piston being so exposed and the piston being connection between the mixture outlet open-v. ing and the float chamber above the level of the liquid in the latter, and a valve' mounted in said connection and formed with a tapering port arranged to automatically the communication between the mixoutlet opening and the float chamber, whereby to regulate pressure on the surface of the fuel in the float chamber. Q

'In testimony whereof, I aflix my signature in presence of two witnesses.

vary

CARL F. SGHULZ. [1 s.] Witnesses:

BL'MUNSON, 1

' GILB RT H. THURSTON. p k 

